1 /* zconf.h -- configuration of the zlib compression library 2 * Copyright (C) 1995-1998 Jean-loup Gailly. 3 * For conditions of distribution and use, see copyright notice in zlib.h 4 */ 5 6 /* @(#) $Id$ */ 7 8 #ifndef _ZCONF_H 9 #define _ZCONF_H 10 11 /* The memory requirements for deflate are (in bytes): 12 (1 << (windowBits+2)) + (1 << (memLevel+9)) 13 that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values) 14 plus a few kilobytes for small objects. For example, if you want to reduce 15 the default memory requirements from 256K to 128K, compile with 16 make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7" 17 Of course this will generally degrade compression (there's no free lunch). 18 19 The memory requirements for inflate are (in bytes) 1 << windowBits 20 that is, 32K for windowBits=15 (default value) plus a few kilobytes 21 for small objects. 22 */ 23 24 /* Maximum value for memLevel in deflateInit2 */ 25 #ifndef MAX_MEM_LEVEL 26 # define MAX_MEM_LEVEL 8 27 #endif 28 29 /* Maximum value for windowBits in deflateInit2 and inflateInit2. 30 * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files 31 * created by gzip. (Files created by minigzip can still be extracted by 32 * gzip.) 33 */ 34 #ifndef MAX_WBITS 35 # define MAX_WBITS 15 /* 32K LZ77 window */ 36 #endif 37 38 /* default windowBits for decompression. MAX_WBITS is for compression only */ 39 #ifndef DEF_WBITS 40 # define DEF_WBITS MAX_WBITS 41 #endif 42 43 /* default memLevel */ 44 #if MAX_MEM_LEVEL >= 8 45 # define DEF_MEM_LEVEL 8 46 #else 47 # define DEF_MEM_LEVEL MAX_MEM_LEVEL 48 #endif 49 50 /* Type declarations */ 51 52 typedef unsigned char Byte; /* 8 bits */ 53 typedef unsigned int uInt; /* 16 bits or more */ 54 typedef unsigned long uLong; /* 32 bits or more */ 55 typedef void *voidp; 56 57 #endif /* _ZCONF_H */ 58
